The Prairie school architects, most notably Frank Lloyd Wright, used water tables as important design elements. Tall and dramatically shaped, the water table shown here not only sheds water but is an important horizontal band that reinforces the overall architectural design.
A water table can be built of the same material as the wall. The different-shaped bricks shown here create a base and path for water.
A water table is also a feature of wood construction and wood-sided homes. The water table for those is a tall trim element that is capped with a drip edge or something else that directs water away from the foundation.